It may not be versatile when compared to the AR/Shotgun platforms but a good bolt action long range precision rifle would round out your stable nicely. A premium .308 or .300 mag (or .338 Lapua if your into self punishment) can be a great new challenge at 600 to 1000 yards. It is definately a different skill set.
IDPA Member A00640
Founding Charter Member - Middle Tennessee Shooter's Club